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2018-09-04Expose TCP RTTTamir Duberstein
PiperOrigin-RevId: 211504634 Change-Id: I9a7bcbbdd40e5036894930f709278725ef477293
2018-09-04Distinguish Element and Linker for ilist.Adin Scannell
Furthermore, allow for the specification of an ElementMapper. This allows a single "Element" type to exist on multiple inline lists, and work without having to embed the entry type. This is a requisite change for supporting a per-Inode list of Dirents. PiperOrigin-RevId: 211467497 Change-Id: If2768999b43e03fdaecf8ed15f435fe37518d163
2018-08-31Automated rollback of changelist 211103930Googler
PiperOrigin-RevId: 211156845 Change-Id: Ie28011d7eb5f45f3a0158dbee2a68c5edf22f6e0
2018-08-31Document more task-goroutine-owned fields in kernel.Task.Jamie Liu
Task.creds can only be changed by the task's own set*id and execve syscalls, and Task namespaces can only be changed by the task's own unshare/setns syscalls. PiperOrigin-RevId: 211156279 Change-Id: I94d57105d34e8739d964400995a8a5d76306b2a0
2018-08-31Do not use fs.FileOwnerFromContext in fs/proc.file.UnstableAttr().Jamie Liu
From //pkg/sentry/context/context.go: // - It is *not safe* to retain a Context passed to a function beyond the scope // of that function call. Passing a stored kernel.Task as a context.Context to fs.FileOwnerFromContext violates this requirement. PiperOrigin-RevId: 211143021 Change-Id: I4c5b02bd941407be4c9cfdbcbdfe5a26acaec037
2018-08-31Disintegrate kernel.TaskResources.Jamie Liu
This allows us to call kernel.FDMap.DecRef without holding mutexes cleanly. PiperOrigin-RevId: 211139657 Change-Id: Ie59d5210fb9282e1950e2e40323df7264a01bcec
2018-08-31Delete the long-obsolete kernel.TaskMaybe interface.Jamie Liu
PiperOrigin-RevId: 211131855 Change-Id: Ia7799561ccd65d16269e0ae6f408ab53749bca37
2018-08-31ipv6: ICMP supportTamir Duberstein
This CL does NDP link-address discovery for IPv6. It includes several small changes necessary to get linux to talk to this implementation. In particular, a hop limit of 255 is necessary for ICMPv6. PiperOrigin-RevId: 211103930 Change-Id: If25370ab84c6b1decfb15de917f3b0020f2c4e0e
2018-08-30fs: Add empty dir at /sys/class/power_supply.Nicolas Lacasse
PiperOrigin-RevId: 210953512 Change-Id: I07d2d7fb0d268aa8eca26d81ef28b5b5c42289ee
2018-08-29ping: update comment about UDPIan Gudger
PiperOrigin-RevId: 210788012 Change-Id: I5ebdcf3d02bfab3484a1374fbccba870c9d68954
2018-08-29fs: Fix renameMu lock recursion.Nicolas Lacasse
dirent.walk() takes renameMu, but is often called with renameMu already held, which can lead to a deadlock. Fix this by requiring renameMu to be held for reading when dirent.walk() is called. This causes walks and existence checks to block while a rename operation takes place, but that is what we were already trying to enforce by taking renameMu in walk() anyways. PiperOrigin-RevId: 210760780 Change-Id: Id61018e6e4adbeac53b9c1b3aa24ab77f75d8a54
2018-08-29fs: Drop reference to over-written file before renaming over it.Nicolas Lacasse
dirent.go:Rename() walks to the file being replaced and defers replaced.DecRef(). After the rename, the reference is dropped, triggering a writeout and SettAttr call to the gofer. Because of lazyOpenForWrite, the gofer opens the replaced file BY ITS OLD NAME and calls ftruncate on it. This CL changes Remove to drop the reference on replaced (and thus trigger writeout) before the actual rename call. PiperOrigin-RevId: 210756097 Change-Id: I01ea09a5ee6c2e2d464560362f09943641638e0f
2018-08-28fasync: don't keep mutex after returnIan Gudger
PiperOrigin-RevId: 210637533 Change-Id: I3536c3f9efb54732a0d8ada8bc299142b2c1682f
2018-08-28fs: Don't bother saving negative dirents.Nicolas Lacasse
PiperOrigin-RevId: 210616454 Change-Id: I3f536e2b4d603e540cdd9a67c61b8ec3351f4ac3
2018-08-28fs: Add tests for dirent ref counting with an overlay.Nicolas Lacasse
PiperOrigin-RevId: 210614669 Change-Id: I408365ff6d6c7765ed7b789446d30e7079cbfc67
2018-08-28sentry: optimize dirent weakref map save / restore.Zhaozhong Ni
Weak references save / restore involves multiple interface indirection and cause material latency overhead when there are lots of dirents, each containing a weak reference map. The nil entries in the map should also be purged. PiperOrigin-RevId: 210593727 Change-Id: Ied6f4c3c0726fcc53a24b983d9b3a79121b6b758
2018-08-28Bump to Go 1.11Michael Pratt
The procid offset is unchanged. PiperOrigin-RevId: 210551969 Change-Id: I33ba1ce56c2f5631b712417d870aa65ef24e6022
2018-08-28sentry: avoid double counting map objects in save / restore stats.Zhaozhong Ni
PiperOrigin-RevId: 210551929 Change-Id: Idd05935bffc63b39166cc3751139aff61b689faa
2018-08-27Add command-line parameter to trigger panic on signalFabricio Voznika
This is to troubleshoot problems with a hung process that is not responding to 'runsc debug --stack' command. PiperOrigin-RevId: 210483513 Change-Id: I4377b210b4e51bc8a281ad34fd94f3df13d9187d
2018-08-27Add /proc/sys/kernel/shm[all,max,mni].Brian Geffon
PiperOrigin-RevId: 210459956 Change-Id: I51859b90fa967631e0a54a390abc3b5541fbee66
2018-08-27Add various statisticsTamir Duberstein
PiperOrigin-RevId: 210442599 Change-Id: I9498351f461dc69c77b7f815d526c5693bec8e4a
2018-08-27fs: Fix remote-revalidate cache policy.Nicolas Lacasse
When revalidating a Dirent, if the inode id is the same, then we don't need to throw away the entire Dirent. We can just update the unstable attributes in place. If the inode id has changed, then the remote file has been deleted or moved, and we have no choice but to throw away the dirent we have a look up another. In this case, we may still end up losing a mounted dirent that is a child of the revalidated dirent. However, that seems appropriate here because the entire mount point has been pulled out from underneath us. Because gVisor's overlay is at the Inode level rather than the Dirent level, we must pass the parent Inode and name along with the Inode that is being revalidated. PiperOrigin-RevId: 210431270 Change-Id: I705caef9c68900234972d5aac4ae3a78c61c7d42
2018-08-27sentry: mark fsutil.DirFileOperations as savable.Zhaozhong Ni
PiperOrigin-RevId: 210405166 Change-Id: I252766015885c418e914007baf2fc058fec39b3e
2018-08-27runsc: Terminal resizing support.Kevin Krakauer
Implements the TIOCGWINSZ and TIOCSWINSZ ioctls, which allow processes to resize the terminal. This allows, for example, sshd to properly set the window size for ssh sessions. PiperOrigin-RevId: 210392504 Change-Id: I0d4789154d6d22f02509b31d71392e13ee4a50ba
2018-08-25Upstreaming DHCP changes from FuchsiaTamir Duberstein
PiperOrigin-RevId: 210221388 Change-Id: Ic82d592b8c4778855fa55ba913f6b9a10b2d511f
2018-08-24runsc: Terminal support for "docker exec -ti".Nicolas Lacasse
This CL adds terminal support for "docker exec". We previously only supported consoles for the container process, but not exec processes. The SYS_IOCTL syscall was added to the default seccomp filter list, but only for ioctls that get/set winsize and termios structs. We need to allow these ioctl for all containers because it's possible to run "exec -ti" on a container that was started without an attached console, after the filters have been installed. Note that control-character signals are still not properly supported. Tested with: $ docker run --runtime=runsc -it alpine In another terminial: $ docker exec -it <containerid> /bin/sh PiperOrigin-RevId: 210185456 Change-Id: I6d2401e53a7697bb988c120a8961505c335f96d9
2018-08-24fs: Drop unused WaitGroup in Dirent.destroy.Nicolas Lacasse
PiperOrigin-RevId: 210182476 Change-Id: I655a2a801e2069108d30323f7f5ae76deb3ea3ec
2018-08-24compressio: support optional hashing and eliminate hashio.Zhaozhong Ni
Compared to previous compressio / hashio nesting, there is up to 100% speedup. PiperOrigin-RevId: 210161269 Change-Id: I481aa9fe980bb817fe465fe34d32ea33fc8abf1c
2018-08-24SyscallRules merge and add were dropping AllowAny rulesFabricio Voznika
PiperOrigin-RevId: 210131001 Change-Id: I285707c5143b3e4c9a6948c1d1a452b6f16e65b7
2018-08-23Implement POSIX per-process interval timers.Jamie Liu
PiperOrigin-RevId: 210021612 Change-Id: If7c161e6fd08cf17942bfb6bc5a8d2c4e271c61e
2018-08-23netstack: make listening tcp socket close state setting and cleanup atomic.Zhaozhong Ni
Otherwise the socket saving logic might find workers still running for closed sockets unexpectedly. PiperOrigin-RevId: 210018905 Change-Id: I443a04d355613f5f9983252cc6863bff6e0eda3a
2018-08-23sentry: mark idMapSeqHandle as savable.Zhaozhong Ni
PiperOrigin-RevId: 209994384 Change-Id: I16186cf79cb4760a134f3968db30c168a5f4340e
2018-08-23Encapsulate netstack metricsIan Gudger
PiperOrigin-RevId: 209943212 Change-Id: I96dcbc7c2ab2426e510b94a564436505256c5c79
2018-08-22Add separate Recycle method for allocator.Adin Scannell
This improves debugging for pagetable-related issues. PiperOrigin-RevId: 209827795 Change-Id: I4cfa11664b0b52f26f6bc90a14c5bb106f01e038
2018-08-22Allow building on !linuxGoogler
PiperOrigin-RevId: 209819644 Change-Id: I329d054bf8f4999e7db0dcd95b13f7793c65d4e2
2018-08-22sentry: mark S/R stating errors as save rejections / fs corruptions.Zhaozhong Ni
PiperOrigin-RevId: 209817767 Change-Id: Iddf2b8441bc44f31f9a8cf6f2bd8e7a5b824b487
2018-08-22Always add AT_BASE even if there is no interpreter.Brian Geffon
Linux will ALWAYS add AT_BASE even for a static binary, expect it will be set to 0 [1]. 1. https://github.com/torvalds/linux/blob/master/fs/binfmt_elf.c#L253 PiperOrigin-RevId: 209811129 Change-Id: I92cc66532f23d40f24414a921c030bd3481e12a0
2018-08-22fs: Hold Dirent.mu when calling Dirent.flush().Nicolas Lacasse
As required by the contract in Dirent.flush(). Also inline Dirent.freeze() into Dirent.Freeze(), since it is only called from there. PiperOrigin-RevId: 209783626 Change-Id: Ie6de4533d93dd299ffa01dabfa257c9cc259b1f4
2018-08-21sentry: do not release gofer inode file state loading lock upon error.Zhaozhong Ni
When an inode file state failed to load asynchronuously, we want to report the error instead of potentially panicing in another async loading goroutine incorrectly unblocked. PiperOrigin-RevId: 209683977 Change-Id: I591cde97710bbe3cdc53717ee58f1d28bbda9261
2018-08-21binary: append slicesIan Gudger
A new optimization in Go 1.11 improves the efficiency of slice extension: "The compiler now optimizes slice extension of the form append(s, make([]T, n)...)." https://tip.golang.org/doc/go1.11#performance-compiler Before: BenchmarkMarshalUnmarshal-12 2000000 664 ns/op 0 B/op 0 allocs/op BenchmarkReadWrite-12 500000 2395 ns/op 304 B/op 24 allocs/op After: BenchmarkMarshalUnmarshal-12 2000000 628 ns/op 0 B/op 0 allocs/op BenchmarkReadWrite-12 500000 2411 ns/op 304 B/op 24 allocs/op BenchmarkMarshalUnmarshal benchmarks the code in this package, BenchmarkReadWrite benchmarks the code in the standard library. PiperOrigin-RevId: 209679979 Change-Id: I51c6302e53f60bf79f84576b1ead4d36658897cb
2018-08-21Expose route tableGoogler
PiperOrigin-RevId: 209670528 Change-Id: I2890bcdef36f0b5f24b372b42cf628b38dd5764e
2018-08-21Build PCAP file with atomic blocking writesIan Gudger
The previous use of non-blocking writes could result in corrupt PCAP files if a partial write occurs. Using (*os.File).Write solves this problem by not allowing partial writes. This change does not increase allocations (in one path it actually reduces them), but does add additional copying. PiperOrigin-RevId: 209652974 Change-Id: I4b1cf2eda4cfd7f237a4245aceb7391b3055a66c
2018-08-21Fix races in kernel.(*Task).Value()Ian Gudger
PiperOrigin-RevId: 209627180 Change-Id: Idc84afd38003427e411df6e75abfabd9174174e1
2018-08-20Fix handling of abstract Unix socket addressesIan Gudger
* Don't truncate abstract addresses at second null. * Properly handle abstract addresses with length < 108 bytes. PiperOrigin-RevId: 209502703 Change-Id: I49053f2d18b5a78208c3f640c27dbbdaece4f1a9
2018-08-20getdents should return type=DT_DIR for SpecialDirectories.Nicolas Lacasse
It was returning DT_UNKNOWN, and this was breaking numpy. PiperOrigin-RevId: 209459351 Change-Id: Ic6f548e23aa9c551b2032b92636cb5f0df9ccbd4
2018-08-20sysfs: Add (empty) cpu directories for each cpu in /sys/devices/system/cpu.Nicolas Lacasse
Numpy needs these. Also added the "present" directory, since the contents are the same as possible and online. PiperOrigin-RevId: 209451777 Change-Id: I2048de3f57bf1c57e9b5421d607ca89c2a173684
2018-08-16fs: Support possible and online knobs for cpuChenggang Qin
Some linux commands depend on /sys/devices/system/cpu/possible, such as 'lscpu'. Add 2 knobs for cpu: /sys/devices/system/cpu/possible /sys/devices/system/cpu/online Both the values are '0 - Kernel.ApplicationCores()-1'. Change-Id: Iabd8a4e559cbb630ed249686b92c22b4e7120663 PiperOrigin-RevId: 209070163
2018-08-16Internal change.Googler
PiperOrigin-RevId: 209060862 Change-Id: I2cd02f0032b80d0087110095548b1a8ffa696ac2
2018-08-15Remove obsolete comment about panickingIan Gudger
PiperOrigin-RevId: 208908702 Change-Id: I6be9c765c257a9ddb1a965a03942ab3fc3a34a43
2018-08-15runsc fsgofer: Support dynamic serving of filesystems.Kevin Krakauer
When multiple containers run inside a sentry, each container has its own root filesystem and set of mounts. Containers are also added after sentry boot rather than all configured and known at boot time. The fsgofer needs to be able to serve the root filesystem of each container. Thus, it must be possible to add filesystems after the fsgofer has already started. This change: * Creates a URPC endpoint within the gofer process that listens for requests to serve new content. * Enables the sentry, when starting a new container, to add the new container's filesystem. * Mounts those new filesystems at separate roots within the sentry. PiperOrigin-RevId: 208903248 Change-Id: Ifa91ec9c8caf5f2f0a9eead83c4a57090ce92068
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